A Trainer for Every Taste

Updated June 24, 2002 12:01 a.m. ET

Personal trainers are certified by a variety of authorities. The American College of Sports Medicine is one recognized nationally. The American Council on Exercise is another. Many trainers today have college degrees in physiology or other sports and medical-related degrees. Because the certification can be so varied, it's a good idea to rely on references or reputable health clubs.

As more people, old and young, seek out personal trainers, niches develop. Some trainers work with new mothers eager to get back into shape....